instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: in 1950 , richard was 4 times as old as robert . in 1955 , richard was 3 times as old as robert . in which year was richard 1.5 times as old as robert ?
answer:
200


question:
Problem: the marks obtained by vijay and amith are in the ratio 8 : 5 and those obtained by amith and abhishek in the ratio of 3 : 2 . the marks obtained by vijay and abhishek are in the ratio of ?
answer:
12 : 5


question:
Problem: ( 856942 x 555 ) = ?
answer:

475602810