fix

src/main/java/cn/com/qmth/scancentral/service/impl/SubjectServiceImpl.java

@@ -223,7 +223,7 @@ public class SubjectServiceImpl extends MppServiceImpl<SubjectDao, SubjectEntity
                     vo.setEstimation("-");
                 } else {
                     vo.setEstimation(Calculator.divide(
-                            Calculator.multiply(Calculator.divide(count, endTime - startTime, 6), vo.getUnexistCount()),
+                            Calculator.multiply(Calculator.divide(endTime - startTime, count, 6), vo.getUnexistCount()),
                             3600000, 2) + "h");
                 }
             }
@@ -239,7 +239,7 @@ public class SubjectServiceImpl extends MppServiceImpl<SubjectDao, SubjectEntity
                 ret.getTotal().setEstimation("-");
             } else {
                 ret.getTotal().setEstimation(
-                        Calculator.divide(Calculator.multiply(Calculator.divide(count, endTime - startTime, 6),
+                        Calculator.divide(Calculator.multiply(Calculator.divide(endTime - startTime, count, 6),
                                 ret.getTotal().getUnexistCount()), 3600000, 2) + "h");
             }
         }