Use 5-meter-long colored silk to make small flags, and each small flag uses (1/8) meters of colored silk on average. (4/5) of these small flags are used to decorate classrooms, (1/10) are used to decorate corridors, and small flags are used to decorate corridors. How many flags?
用5米长的彩绸做小旗，平均每面小旗用彩绸(1/8)米，这些小旗的(4/5)用来装饰教室，(1/10)装饰走廊，装饰走廊用小旗多少面？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">5 / (1/8)</gadget>
<output>40</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">40 * (1/10)</gadget>
<output>4</output>

<result>4</result>