I got this question on the entrance exam for MCS ,can someone tell me how it's solved or provide code for it please , I have a feeling it will be helpful for the next exam.Thanks
Write a java class that multiplies the long number. The class will receive multiplicand and multiplier as string inputs, convert string values to their digit represent and show the partial products and product as shown in the example below:
We don't hand out complete solutions here. Instead, we can help you solve the problem by yourself.
Write a class that has a method that splits the multiplier into single digits. Then, you can multiply the multiplicand with a multiplier digit times 10 to the power of the digit's position to get the partial product.
Hope it's not too late, but in addition to the helpful advice you have already received:-
Write down carefully on paper how you do “long” multiplication by hand. Things like, “put the rightmost digit under the digit being multiplied and pack with 0s,” are what you want. When you have such an explanation on paper, it is much easier to turn into code.