Teacher Wang originally planned to buy 8 pencil sharpeners with a unit price of 46 yuan as prizes, but later decided to buy 4 pencil sharpeners, and use the saved money to buy mechanical pencils with a unit price of 4 yuan. How many mechanical pencils can I buy?
王老师原计划买8只单价为46元的卷笔刀作为奖品，后来决定买4只卷笔刀，用省下的钱再买单价为4元的活动铅笔，可以买活动铅笔多少支？
<gadget id="calculator">8 - 4</gadget>
<output>4</output>

<gadget id="calculator">4 / 4</gadget>
<output>1</output>

<gadget id="calculator">46 * 1</gadget>
<output>46</output>

<result>46</result>