The product of two multipliers is 250, one multiplier remains unchanged, and the other multiplier is increased by 4, what is the product.
两个乘数的积是250，一个乘数不变，另一个乘数扩大4，积是多少．
<gadget id="calculator">250 * 4</gadget>
<output>1_000</output>

<result>1_000</result>