The class leader distributes homework books, each person distributes 8 books, and there are 18 books left. If two of them give out 4 books each, and the rest share 10 books, it will be just divided. Ask how many homework books there are.
班长发作业本，每人发8本，还剩18本，如果其中两人每人发4本，其余的人各分10本，就正好分光，问有多少本作业本．
<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 18</gadget>
<output>30</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">120 + 18</gadget>
<output>138</output>

<result>138</result>