If one factor (except 0) is enlarged by 10 times and the other factor is reduced by 1000 times, what is the product?
一个因数(0除外)扩大10倍，另一个因数缩小1000倍，积多少．
<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">1_000 / 1_000</gadget>
<output>1</output>

<gadget id="calculator">30 * 1</gadget>
<output>30</output>

<gadget id="calculator">3_000 / 30</gadget>
<output>100</output>

<result>100</result>