783 Followers Problem

$a(a+b)(a+b+c)(a+b+c+d)=783$

Given that $$a,b,c,d$$ are positive integers and that they satisfy the above equation, find their product: $$a \times b \times c \times d$$.

This is part of the set Trevor's Ten

Based off of one of Sualeh Asif's posts.

×