Xianfeng Township originally had 12.6 hectares of rice fields and 3.6 hectares of vegetable fields. This year, it is planned to replant part of the rice fields with vegetables, so that the ratio of the number of hectares of rice fields to harvested land is 5:3. How many hectares will the harvested land increase?
先锋乡原有稻田12.6公顷，菜地3.6公顷，今年计划把部分稻田改种菜，使稻田与采地公顷数的比是5：3，采地要增加多少公顷？
<gadget id="calculator">12.6 + 3.6</gadget>
<output>16.2</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">16.2 * (3/8)</gadget>
<output>6.075</output>

<gadget id="calculator">6.075 - 3.6</gadget>
<output>2.475</output>

<result>2.475</result>