There are 5 red, yellow, blue, and green beads of the same size in the box. If you touch one each time and put it back, after touching it 40 times, how many times will you touch the green bead?
盒子里有大小相同的红、黄、蓝、绿色的珠子各5颗，如果每次摸一个，再放回去，摸了40次，大约会有多少次摸到绿色的珠子．
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">5 / 20</gadget>
<output>1/4 = around 0.25</output>

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

<result>10</result>