Uncle Wang planted 200 trees, and the survival rate was 95%. How many trees survived?
王大伯植树200棵，成活率是95%，成活了多少棵．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">200 * (19/20)</gadget>
<output>190</output>

<result>190</result>