There are 15 baskets of tomatoes, and the number of baskets of potatoes is three times that of tomatoes. The number of baskets of cabbage is 8 less than the total number of baskets of tomatoes and potatoes. How many baskets of cabbage are there?
番茄有15筐，土豆的筐数是番茄的3倍．白菜的筐数比番茄和土豆的总筐数少8筐．白菜有多少筐？
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<gadget id="calculator">15 - 8</gadget>
<output>7</output>

<gadget id="calculator">45 + 7</gadget>
<output>52</output>

<result>52</result>