The cafeteria bought 4 baskets of tomatoes, each with 106 tomatoes. After using up 300 tomatoes, how many are left?
食堂买来4筐番茄，每筐106个．用去300个番茄后，还剩多少个？
<gadget id="calculator">106 * 4</gadget>
<output>424</output>

<gadget id="calculator">424 - 300</gadget>
<output>124</output>

<result>124</result>