Аfter additions and substractions, the next thing you should learn is multiplications and divisions. Multiplications are quite simple, because you just need to multiply a numerator with another numerator, and the denominator with another denominator. Then you get the results. For divisions, there is one small trick. Instead of dividing it straight forward, you need to flip the numerator and denominator of the second term. In other words, multiply the numerator of the first term with the denominator of the second term, and multiply the denominator of the first term with the numerator of the second term. If you are still confused, it might be a good idea to take a look at the illustrations above.