How do you solve this question

Did you try the calculator here? Try it and see what you get.

Enter your first number 1739867009, then enter / sign followed by your second number 987867800009, then press = sign. You should get 0.00176123466.......

WolframAlpha will handle this kind of thing easily, Asad

Here is the website  : https://www.wolframalpha.com/input/?i=125+%2B+375&lk=3

BTW.....the result is  :   0.001761234660127750786146537262298337049389923395170376734....