Find a pocket calculator accurate to at least eight figures, that is, which can multiply a four-figure number by a four-figure number and get the correct eight-figure answer. You are required to multiply 31415975 by 8182818. Show how the divide-and-conquer multiplication algorithm of Section 1.2 can be used to reduce the problem to a small number of calculations that you can do on your calculator, followed by a simple paper-and-pencil addition. Carry out the calculation