The older brother has 5 times as many comic books as the younger brother, and after everyone gets 18 more comic books, the older brother has 2 times as many comic books as the younger brother. How many comic books did my brother have?
哥哥有漫画书是弟弟的5倍，每人再得到18本漫画书后，哥哥的漫画书是弟弟的2倍．问哥哥原有多少本漫画书？
<gadget id="calculator">2 * 18</gadget>
<output>36</output>

<gadget id="calculator">36 - 18</gadget>
<output>18</output>

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

<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>