Fruit farmer Uncle Wang's fruit income last year was 84,000 yuan. Due to natural disasters, it is expected that this year's income will drop by 15% compared to last year. How much is the estimated income this year?
果农王大伯去年的水果收入是84000元，由于天灾，预计今年的收入将比去年下降一成五，预计今年的收入是多少元？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">84_000 * (17/20)</gadget>
<output>71_400</output>

<result>71_400</result>