There are two piles of stones on the construction site, the first pile is 300 tons, the second pile is 4 tons less than twice the first pile, how many tons do the two piles of stones weigh in total?
工地有两堆石子，第一堆300吨，第二堆比第一堆的2倍少4吨，两堆石子共重多少吨？
<gadget id="calculator">300 * 2</gadget>
<output>600</output>

<gadget id="calculator">600 - 4</gadget>
<output>596</output>

<gadget id="calculator">596 + 300</gadget>
<output>896</output>

<result>896</result>