Multiply. Use the lattice method. 277*32=
I hope your teacher does not teach this method as a viable method for multiplication.
A week ago Yahoo presented this method as a novelty and as a "math trick".
This website explains and shows diagrams for multiplying using the lattice method.
Math 110 - Nikki, Sunday, March 30, 2014 at 4:23pm
Multiply 28x72 using lattice method.
Write 278 as a product of prime numbers.