In an opaque box, there are four balls of the same shape and size in four colors: green, pink, yellow, and red. Touch one ball each time and put it back after touching it. There are 80 touches in total. How many times can you touch a red ball? ．
在一个不透明的盒子里装着绿、粉、黄、红四种颜色且形状大小相同的四个球，每次摸一个球，摸完后放回，共摸80次，可能摸到多少次红球．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 80</gadget>
<output>20</output>

<result>20</result>