For the product of two numbers, if one number increases by 3 and the other multiplier remains unchanged, the product increases by 18. If one multiplier remains the same and the other multiplier decreases by 4, then the product decreases by 200. What is the original product?
两个数的积，如果一个数增加3，另一个乘数不变，积增加18．如果一个乘数不变，另一个乘数减少4，那么积减少200．原来的积是多少？
<gadget id="calculator">200 / 4</gadget>
<output>50</output>

<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<result>300</result>