Упростите выражение:
1)3/7a*8/9d
2)3 1/6c*7/19d
3)3 3/7m*3k*4 3/8p

3/7a*8/9d = 3*8/7a*9d = 24/7a*9d3 1/6c*7/19d = 3 1*7/6c*19d = 3 7/6c*19d3 3/7m*3k*4 3/8p = 3*4  3*3k*3/7m*8p = 129k/7m*8p