I can give you a fraction instead:
12/155= a fraction, when you input it in a calculator.
so, you would do 12/1 times 1/155. When you want to divide fractions, you use a reciprocal. This is when you kind of flip the numerator and denominator. Also, when you want to turn whole numbers into fractions, you just make a dividing bar (fraction) and use 1 as the denominator.
Ok, so next, you do 12 times one. That's 12. Then, you do 1 times 155. That's 155. Your final answer should be 12/155. Sorry if it's wrong, but this is the only way I could think of w/o decimals