simple calculator, arbitrary precision
number 1
base
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
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28
29
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31
32
33
34
35
36
37
10
operator
+
-
*
/
number 2
base
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
10
maxlength
result