Let BCDEF=X

[A * 100000+X]* M = 10X+A

Because six digits multiplied by three or six digits means that m is less than or equal to 3 and a is less than or equal to 3.

When m = 3 and a = 3.

[3 * 100000+X]* 3 = 10X+3

X= 12857 1

Inconsistent with the topic

When M=3. A=2

X=857 14, which is appropriate.

When M=3, A= 1.

X=42857, appropriate.

When m = 2 and a = 3.

X=74999.625 No.

When M=2A=2

X=49999.75 No.

...

After inspection, when M=3, A=2 or 1 is appropriate.

Namely: 2857 14*3=857 142.

142857*3=42857 1