1. The problem is to calculate the product of 4 and 86. 2. The formula for multiplication is: $$a \times b = \text{product}$$ where $a$ and $b$ are numbers. 3. Substitute the values: $$4 \times 86$$ 4. Multiply 4 by 86: $$4 \times 86 = 344$$ 5. Therefore, the product of 4 and 86 is 344.