Use a rectangular red cloth with a length of 40 cm and a width of 30 cm to make a right-angled triangle flag. The two right-angled sides of the flag are 10 cm and 5 cm respectively. How many small flags like this can be made from this piece of cloth?
用一块长40厘米、宽30厘米的长方形红布做直角三角形小旗，小旗的两条直角边分别是10厘米和5厘米．这块布最多可以做多少面这样的小旗？
<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">30 / 5</gadget>
<output>6</output>

<gadget id="calculator">4 * 6 * 2</gadget>
<output>48</output>

<result>48</result>