public static void main(String args[]){
        RussianPeasantMultiplication rpm = new RussianPeasantMultiplication();
        System.out.println(rpm.multiply(7, 13));
    }
http://www.geeksforgeeks.org/fast-multiplication-method-without-using-multiplication-operator-russian-peasants-algorithm/
Test cases
Division by 0
Negative numbers
src/com/interview/number/RussianPeasantMultiplication.java