Li Ming and Wang Hua used a piece of rectangular red cloth with a length of 15 decimeters and a width of 9 decimeters, and cut it into an isosceles right-angled triangle flag with a side length of 30 centimeters. How many sides can they cut with this piece of red cloth? flag?
李明和王华用一块长15分米，宽9分米的长方形红布，剪成直角边长是30厘米的等腰直角三角形小旗，他们用这块红布最多可以剪成多少面这样的小旗？
<gadget id="calculator">30 / 10</gadget>
<output>3</output>

<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">5 * 3 * 2</gadget>
<output>30</output>

<result>30</result>