$\"\"$

The sentence is the circumference “C” of a circle equals the product of 2,

$\"\"$ and the radius “r”.

The word “equals” can be represented as “ = ” symbol.

The word “product” indicates multiplication and the symbol is “ $\"\"$ ” . $\"\"$

Rewrite the sentence into expression as \ \

$\"\"$ $\"\"$

The equation is c = 2 $\"\"$ .