Students do exercises, each row of 12 people is exactly 4 rows; if each row of 8 people, how many more rows can be arranged.
同学们做操，每行排12人正好排4行；如果每行排8人，可以多排多少行．
<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">12 * (1/2)</gadget>
<output>6</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<result>2</result>