A piece of square red paper with a side length of 12 decimeters can be used to make a right-angled triangle red flag with a base of 30 centimeters and a height of 20 centimeters. How many sides can be made at most?
一张正方形红纸，边长是12分米，用它来做底是30厘米，高是20厘米的直角三角形小红旗，最多可以做多少面？
<gadget id="calculator">10 / 30</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / 20</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">12 * (1/3) * 12 * (1/2) * 2</gadget>
<output>48</output>

<result>48</result>