Xiaoqiang and Xiaogang transported honeycomb briquettes to Grandma Wang, who belongs to the army. Xiaoqiang transported all of them (3/8), and Xiaogang transported 50 pieces of honeycomb briquettes. At this time, the briquettes they transported in total happened to be none (5/7). Ask how many briquettes have not been shipped yet?
小强和小刚给军属王奶奶运蜂窝煤，小强运了全部的(3/8)，小刚运了50块蜂窝煤，这时他们一共运来的蜂窝煤恰好是没运来的(5/7)，问还有多少块蜂窝煤没有运来？
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">12 * (3/8)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">5 - (9/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 / (1/2)</gadget>
<output>100</output>

<gadget id="calculator">100 * 7</gadget>
<output>700</output>

<result>700</result>