An orchard harvested 89 tons of fruit this year, 12 tons more than last year. How many tons of fruit were harvested this year and last year?
一个果园今年收水果89吨，比去年多收12吨，今年和去年一共收水果多少吨？
<gadget id="calculator">89 - 12</gadget>
<output>77</output>

<gadget id="calculator">77 + 89</gadget>
<output>166</output>

<result>166</result>