1. The problem is to evaluate the expression $602 \times 20$ where 20 is underlined. 2. The multiplication formula is $a \times b = c$, where $a$ and $b$ are numbers and $c$ is their product. 3. Multiply 602 by 20: $$602 \times 20 = 602 \times (2 \times 10) = (602 \times 2) \times 10$$ 4. Calculate $602 \times 2$: $$602 \times 2 = 1204$$ 5. Now multiply 1204 by 10: $$1204 \times 10 = 12040$$ 6. Therefore, the final answer is: $$602 \times 20 = 12040$$ This means if you have 602 groups of 20 items each, you have a total of 12040 items.