Using the same bricks to pave the floor, 306 bricks are used to pave 9 square meters. How many bricks are used to pave 15 square meters? (Solve with ratio)
用同样的砖铺地，铺9平方米用砖306块，如果铺15平方米，要用多少块砖？(用比例解)
<gadget id="calculator">15 / 9</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">306 * (5/3)</gadget>
<output>510</output>

<result>510</result>