Metamath Proof Explorer


Theorem 3t1e3

Description: 3 times 1 equals 3. (Contributed by David A. Wheeler, 8-Dec-2018)

Ref Expression
Assertion 3t1e3 3 1 = 3

Proof

Step Hyp Ref Expression
1 3cn 3
2 1 mulid1i 3 1 = 3