The price of 3 basketballs is the same as that of 5 volleyballs. The school sports room bought 9 basketballs and 4 volleyballs. The total payment is 855 yuan. How much is a volleyball?
3个篮球的价钱和5个排球的价钱一样，学校体育室买了9个篮球和4个排球，共付款855元，一个排球多少元．
<gadget id="calculator">15 + 4</gadget>
<output>19</output>

<gadget id="calculator">855 / 19</gadget>
<output>45</output>

<result>45</result>