A few students moved bricks, each of them moved 11 yuan, and there was still a shortage of 13 yuan; each of them moved 9 yuan, and the last person only moved 6 yuan. Then how many students are moving bricks?
几个同学搬砖，每人搬11块，还缺13块；每人搬9块，最后1人只搬6块．则搬砖的同学一共有多少人．
<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<gadget id="calculator">13 - 3</gadget>
<output>10</output>

<gadget id="calculator">11 - 9</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>