The plane driven by Uncle Wang flies 450 kilometers per hour, which is 1/8 faster than the plane driven by Uncle Li. What is the correct formula for calculating the speed of Uncle Li's plane per hour?
王叔叔驾驶的飞机每小时飞行450千米，比李叔叔驾驶的飞机快(1/8)，求李叔叔驾驶的飞机每小时飞行的速度的正确算式是多少
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + (1/8)</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">450 / (9/8)</gadget>
<output>400</output>

<result>400</result>