If the number is a and learning is b, then:
Mathematics multiplied by mathematics equals learning mathematics.
= & gtab*ab=bab
It can be concluded that the last digit of the product of b*b is the same as b.
The range of deductive b can only be 1, 5, 6.
Classification test takes a = 1, 2,3:
1 1* 1 1= 12 1
2 1*2 1=44 1
3 1*3 1=96 1
15* 15=225
25*25=625
16* 16=256
26*26=676
So there is no suitable value, no solution!