A room needs 70 square bricks with an area of 60dm**2 to pave the floor. If square bricks with a side length of 10dm are used, how many bricks are needed?
一间房间用面积是60dm**2的方砖铺地需要70块，如果用边长是10dm的方砖，需要多少块？
<gadget id="calculator">60 * 70</gadget>
<output>4_200</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">4_200 / 100</gadget>
<output>42</output>

<result>42</result>