Question
516 x 13 + 312 x 13 + 313 x 13
= (a)            x 13
= (b)           
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

516 x 13 + 312 x 13 + 313 x 13
= (a)            x 13
= (b)