The living room of Mr. Zhu’s house is paved with square bricks, and 25 decimeters ** 2 square bricks are used to pave, and 112 square bricks are needed; if 100 decimeters ** 2 square bricks are used instead, how many square bricks are needed.
朱老师家的客厅用方砖铺地，用25分米**2的方砖铺，需要方砖112块；如果改用100分米**2的方砖铺，需要方砖多少块．
<gadget id="calculator">25 * 112</gadget>
<output>2_800</output>

<gadget id="calculator">2_800 / 100</gadget>
<output>28</output>

<result>28</result>