The plant group sowed 80 cabbage seeds in the school botanical garden. The germination rate of the seeds was 90%. How many seeds did not germinate?
植物小组在学校植物园里播下80粒白菜种子，种子的发芽率为90%，有多少粒种子没有发芽．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">80 * (9/10)</gadget>
<output>72</output>

<gadget id="calculator">80 - 72</gadget>
<output>8</output>

<result>8</result>