At the same time that Mr. Zhang climbed from the 1st floor to the 5th floor, Mr. Shi climbed from the 1st floor to the 4th floor. At this speed, how many floors did Mr. Zhang climb from the 1st floor to the 13th floor while Mr. Shi climbed from the 1st floor to the 13th floor?
张老师从1楼爬到5楼的同时石老师从1楼爬到了4楼，照这样的速度，石老师从1楼爬到13楼的同时，张老师从1楼爬到了多少楼．
<gadget id="calculator">5 * 13</gadget>
<output>65</output>

<gadget id="calculator">1 - 5 - 13</gadget>
<output>-17</output>

<gadget id="calculator">65 + (-17)</gadget>
<output>48</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<result>16</result>