Question

The 2 button and 6 button do not work.

Answer 1

One solution:

He can do the addition 81.355 + 1.01 which will give the result 82.365. In this way, he can avoid using 2 and 6.

Second solution:

He can do the subtraction 83.375 - 1.01 which will also give the same result 82.365. This is another way he can avoid using 2 and 6.