The price of each volleyball in a sporting goods store is 28 yuan, and the price of each basketball is 52 yuan. Teacher Li bought 5 basketballs and volleyballs for the school today, and spent 212 yuan. How many volleyballs did Mr. Li buy?
体育用品店每个排球售价28元，每个蓝球售价52元．李老师今天为学校买篮球和排球共5个，用了212元钱．李老师买了几个排球？
<gadget id="calculator">28 * 5</gadget>
<output>140</output>

<gadget id="calculator">212 - 140</gadget>
<output>72</output>

<gadget id="calculator">52 - 28</gadget>
<output>24</output>

<gadget id="calculator">72 / 24</gadget>
<output>3</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<result>2</result>