The Xinchang tea shop shipped a batch of first-grade tea and second-grade tea. The quality of the second-grade tea is 1/2 that of the first-grade tea. The purchase price of the first-grade tea is 248 yuan per kilogram, and the quality of the second-grade tea is The purchase price is 160 yuan per kilogram. Now sell at the purchase price plus 12.5%. When all the second-grade tea leaves are sold out and the first-grade tea is left (1/3), the total profit is 4600 yuan. How many kilograms of first-grade tea are shipped?
新昌茶叶店运到一级茶叶和二级茶叶各一批，其中二级茶叶的质量是一级茶叶的(1/2)，一级茶叶的买进价是每千克248元，二级茶叶的买进价是每千克160元．现在按买进价加像12.5%出售，当二级茶叶全部售完，一级茶叶剩下(1/3)时，共盈利4600元．运到的一级茶叶有多少千克？
<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">160 * 0.125 * (1/2)</gadget>
<output>10</output>

<gadget id="calculator">248 * 0.125</gadget>
<output>31</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">248 * 0.125 * (1/3)</gadget>
<output>10.333333</output>

<gadget id="calculator">31 - 10.333333</gadget>
<output>20.666667</output>

<gadget id="calculator">10 + 20.666667</gadget>
<output>30.666667</output>

<gadget id="calculator">4_600 / 30.666667</gadget>
<output>149.999998</output>

<result>149.999998</result>