added stripTrailingZeros

src/main/java/com/pfefferminzia/petinsurance/calculations/Calculations.java

@@ -33,14 +33,14 @@ public class Calculations {
         BigDecimal breedPremiumAdjustment = breedFactorLookup(animal);
 
         BigDecimal yearlyPremium = insuranceSum.multiply(ageFactor)
-                .multiply(BigDecimal.ONE.add(breedPremiumAdjustment));
+                .multiply(BigDecimal.ONE.add(breedPremiumAdjustment)).stripTrailingZeros();
 
         return new CalculationResult(insuranceSum, yearlyPremium);
     }
 
     private BigDecimal getInsuranceSum(BigDecimal baseInsuranceSum, BigDecimal tariffRate) {
 
-        return baseInsuranceSum.multiply(tariffRate);
+        return baseInsuranceSum.multiply(tariffRate).stripTrailingZeros();
     }
 
     private BigDecimal ageFactorLookup(LocalDate birthday, LocalDate insuranceStartDate) {