엑셀업로드 제어로직 개선

backend-node/src/services/nodeFlowExecutionService.ts

@@ -4446,6 +4446,8 @@ export class NodeFlowExecutionService {
 
   /**
    * 산술 연산 계산
+   * 다중 연산 지원: (leftOperand operator rightOperand) 이후 additionalOperations 순차 적용
+   * 예: (width * height) / 1000000 * qty
    */
   private static evaluateArithmetic(
     arithmetic: any,
@@ -4472,27 +4474,67 @@ export class NodeFlowExecutionService {
     const leftNum = Number(left) || 0;
     const rightNum = Number(right) || 0;
 
-    switch (arithmetic.operator) {
+    // 기본 연산 수행
+    let result = this.applyOperator(leftNum, arithmetic.operator, rightNum);
+    
+    if (result === null) {
+      return null;
+    }
+
+    // 추가 연산 처리 (다중 연산 지원)
+    if (arithmetic.additionalOperations && Array.isArray(arithmetic.additionalOperations)) {
+      for (const addOp of arithmetic.additionalOperations) {
+        const operandValue = this.getOperandValue(
+          addOp.operand,
+          sourceRow,
+          targetRow,
+          resultValues
+        );
+        const operandNum = Number(operandValue) || 0;
+        
+        result = this.applyOperator(result, addOp.operator, operandNum);
+        
+        if (result === null) {
+          logger.warn(`⚠️ 추가 연산 실패: ${addOp.operator}`);
+          return null;
+        }
+        
+        logger.info(`   추가 연산: ${addOp.operator} ${operandNum} = ${result}`);
+      }
+    }
+
+    return result;
+  }
+
+  /**
+   * 단일 연산자 적용
+   */
+  private static applyOperator(
+    left: number,
+    operator: string,
+    right: number
+  ): number | null {
+    switch (operator) {
       case "+":
-        return leftNum + rightNum;
+        return left + right;
       case "-":
-        return leftNum - rightNum;
+        return left - right;
       case "*":
-        return leftNum * rightNum;
+        return left * right;
       case "/":
-        if (rightNum === 0) {
+        if (right === 0) {
           logger.warn(`⚠️ 0으로 나누기 시도`);
           return null;
         }
-        return leftNum / rightNum;
+        return left / right;
       case "%":
-        if (rightNum === 0) {
+        if (right === 0) {
           logger.warn(`⚠️ 0으로 나머지 연산 시도`);
           return null;
         }
-        return leftNum % rightNum;
+        return left % right;
       default:
-        throw new Error(`지원하지 않는 연산자: ${arithmetic.operator}`);
+        throw new Error(`지원하지 않는 연산자: ${operator}`);
     }
   }