Buy 6 volleyballs and 8 basketballs for 249.6 yuan. It is known that the unit price of a volleyball is 15.6 yuan. How much is the unit price of basketball?
买6个排球和8个篮球共用去249.6元．已知排球的单价是15.6元．篮球的单价是多少元？
<gadget id="calculator">6 * 15.6</gadget>
<output>93.6</output>

<gadget id="calculator">249.6 - 93.6</gadget>
<output>156</output>

<gadget id="calculator">156 / 8</gadget>
<output>39/2 = around 19.5</output>

<result>39/2 = around 19.5</result>