a. 910 x 56 = 9x510x6 = 3x$⧸3$x$⧸5$$⧸5$x2x$⧸3$x2
= 34
b. 625 : 2120 = 6x2025x21 = 2x$⧸3$x4x$⧸5$5x$⧸5$x$⧸3$x7
= 835
c. 407 x 145 = 40x147x5 = 8x$⧸5$x2x$⧸7$$⧸5$x$⧸7$
= 161 = 16
d. 1713 : 5126 = 17x2613x51 = $⧸17$x$⧸13$x2$⧸13$x3x$⧸17$
= 23