The students went to plant trees, 264 people went to the sixth grade, the number of the fifth grade went to the sixth grade (5/6), and the number of the fourth grade went to the fifth grade (9/10). How many people went to the fourth grade?
同学们去植树，六年级去了264人，五年级去的人数是六年级(5/6)，四年级去的人数是五年级的(9/10)．四年级去了多少人？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">264 * (5/6) * (9/10)</gadget>
<output>198</output>

<result>198</result>