Li Ying and Huang Ming compete on the stairs. When Li Ying walks 3 stairs, Huang Ming can walk 5. There are 20 stairs between every two floors of this building. When Huang Ming walks to the 6th floor, how many steps does Li Ying walk? Floors?
李英和黄明比赛走楼梯，李英走3级楼梯时，黄明能走5级，这幢楼每两层之间有20级楼梯，那么当黄明走到6层楼时，李英走到几层楼？
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 * (3/5)</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<result>4</result>