不能理解两个运算式，求大神答疑解惑

Question

10 + 9 * ((8 + 7) % 6) + 5 * 4 % 3 * 2 + 3 

1 + 2 + (3 + 4) * ((5 * 6 % 7 / 8) - 9) * 10

输出结果分别为 44    -627

Answer 1

%是取余数，/是取整数

10 + 9 * ((8 + 7) % 6) + 5 * 4 % 3 * 2 + 3 

= 10 + 9 * 15% 6 + 20%3 * 2 + 3

= 10 + 9 * 3 + 2 * 2 + 3 

= 10 + 27 + 4+ 3

=44

 

1 + 2 + (3 + 4) * ((5 * 6 % 7 / 8) - 9) * 10

=3 + 7 * （30 % 7 /8  -9 ) * 10

=3 + 7 * (2 / 8 - 9 ) * 10

=3 + 7 * (0 - 9 ) * 10

= 3 + ( - 63 * 10)

=3+ (-630)

= - 627