Osmanthus saplings, 16 yuan per plant, and buy 3 free 1 plant. Principal Hu spent 192 yuan to buy and plant in the campus. How many osmanthus saplings can he buy?
桂花小树苗，每株16元，且每买3株送1株．胡校长用192元去买来种植在校园里，他能买到多少株桂花树苗？
<gadget id="calculator">192 / 16</gadget>
<output>12</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">12 + 4</gadget>
<output>16</output>

<result>16</result>