How to Calculate the Number 13[br][br]1) Type 10 into input Box ( Best way to type into box: Click in box to Right Side of Number - Back Space - Type in New Number )[br][br]2) Result = 5.85 [br][br]3) Divide 5.85 / 1.35 = 4.333333333333[br][br]4) Multiply by 3 giving the number 13[br][br]5) 4.333333333 * 3 = 13