Mom went to buy rice and flour, 2.6 yuan per kilogram of rice, 2.3 yuan per kilogram of flour, he bought 20 kilograms of flour and some rice, paid a total of 61.6 yuan, how many kilograms of rice did he buy?
妈妈去买大米和面粉，每千克大米2.6元，每千克面粉2.3元，他买了20千克面粉和若干大米，共付款61.6元，买大米多少千克？
<gadget id="calculator">2.3 * 20</gadget>
<output>46</output>

<gadget id="calculator">61.6 - 46</gadget>
<output>15.6</output>

<gadget id="calculator">15.6 / 2.6</gadget>
<output>6</output>

<result>6</result>