For the same square brick paving, 144 bricks are used to pave 18 square meters. How many square meters can be paved with the existing 840 square bricks?
同样的方砖铺地，铺18平方米用砖144块，现有840块方砖可铺地多少平方米？
<gadget id="calculator">18 / 144</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">840 * (1/8)</gadget>
<output>105</output>

<result>105</result>