The school bought 8 footballs at 28 yuan each, and several basketballs at 98 yuan each, with a total payment of 616 yuan. How many basketballs did the school buy?
学校买来8个足球，每个28元，又买来几个篮球，每个98元，共付616元，学校买了几个篮球？
<gadget id="calculator">28 * 8</gadget>
<output>224</output>

<gadget id="calculator">616 - 224</gadget>
<output>392</output>

<gadget id="calculator">392 / 98</gadget>
<output>4</output>

<result>4</result>