diff --git a/src/client/services/prepareData.ts b/src/client/services/prepareData.ts
index ba4eccf..89aadec 100644
--- a/src/client/services/prepareData.ts
+++ b/src/client/services/prepareData.ts
@@ -489,7 +489,7 @@ export const prepareCalculationData = ({
 
     if (evo_coefficient) {
       preparedValues.ratBonus =
-        evo_coefficient.evo_sot_coefficient || 0 * (preparedValues.rats || 0);
+        (evo_coefficient.evo_sot_coefficient || 0) * (preparedValues.rats || 0);
     }
   }
 
@@ -512,8 +512,8 @@ export const prepareCalculationData = ({
 
     if (evo_coefficient) {
       preparedValues.nsibBonus =
-        evo_coefficient.evo_sot_coefficient ||
-        0 * (preparedValues.nsibBrutto || 0);
+        (evo_coefficient.evo_sot_coefficient || 0) *
+        (preparedValues.nsibBrutto || 0);
     }
   }
 
@@ -536,8 +536,8 @@ export const prepareCalculationData = ({
 
     if (evo_coefficient) {
       preparedValues.nsBonus =
-        evo_coefficient.evo_sot_coefficient ||
-        0 * insuranceNSRow?.insCost?.value;
+        (evo_coefficient.evo_sot_coefficient || 0) *
+        insuranceNSRow?.insCost?.value;
     }
   }