Yucai Primary School has 630 students, the first grade accounts for (2/7), the second grade is the first grade (8/9), how many students are there in the second grade?
育才小学有学生630人，一年级占(2/7)，二年级是一年级的(8/9)，二年级有学生多少人？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">630 * (2/7) * (8/9)</gadget>
<output>160</output>

<result>160</result>