You don't have to use a translator - feel comfortable to post in your own language. Some translators are not accurate, which complicate things. We use the Yandex Translate in our community, which might be more accurate.
Also, saying that you don't have time is not an excuse for not learning App Inventor. Without learning the basics of App Inventor, how are you going to build a successful app?
A journey of a thousand miles begins with a single step. - Lao-tzu, Chinese philosopher
To turn a decimal number into a numerator and denominator,
split the number at '.'
if the resulting list has only 1 item,
then the numerator is item 1 and the denominator is 1.
else
set local power = 10 ^ (text length of item 2)
numerator = original number * power
denominator = power
Example with 3.14 as original number
Split at '.' to get list [3,14]
Length ('14') = 2
power = 10 ^ 2 = 100
numerator = 3.14 * 100 = 314
denominator = 100