The grain output of a certain place was 3,000 tons the year before last, but last year was nearly 30% less than the previous year due to the impact of floods and pests. It is expected that this year's output will increase by 45% compared to last year. How many tons of grain will be produced this year?
某地前年的粮食产量为3000吨，去年因为洪水及病虫害的影响比前年减产近三成．预计今年的产量会比去年增加45%，今年的粮食产量是多少吨？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 + (9/20)</gadget>
<output>29/20 = around 1.45</output>

<gadget id="calculator">3_000 * (7/10) * (29/20)</gadget>
<output>3_045</output>

<result>3_045</result>