If Mr. Wang buys 10 basketballs with the money in his pocket, there will be a yuan left; if he buys 16 basketballs, he will lose b yuan. How much is each basketball.
王老师口袋里的钱买10个篮球，还剩下a元；如果买16个篮球，则少b元．每个篮球多少元．
<gadget id="calculator">16 - 10</gadget>
<output>6</output>

<result>6</result>