The Industrial and Commercial Management Office of the urban area conducted food safety spot checks on major supermarkets in the jurisdiction. It randomly checked 80 boxes of ham sausages from a department store, and the result was a pass rate of 90%. Do you know how many boxes of ham sausages in this spot check were qualified?
城区工商管理所对辖区的各大超市进行食品安全抽查，从某百货市场抽查了80箱火腿肠，结果合格率是90%，你知道这次抽查有多少箱火腿肠是合格的吗？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

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

<result>72</result>