To process a batch of tea leaves, 60 kilograms have been processed, which is 15 kilograms more than the remaining 1.5 times. How many kilograms of this batch of tea are left unprocessed?
加工一批茶叶，已经加工了60千克，比剩下的1.5倍多15千克．这批茶叶还剩下多少千克没加工完？
<gadget id="calculator">60 - 15</gadget>
<output>45</output>

<gadget id="calculator">45 / 1.5</gadget>
<output>30</output>

<result>30</result>