On the clock face, what is the angle between the hour and minute hands and the hour hand (an angle less than 180°) at 1:45?
在时钟钟面上，1点45分时分针与时针的夹角(小于180゜的角)是多少．
<gadget id="calculator">4 * 30</gadget>
<output>120</output>

<gadget id="calculator">45 / 60</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 30</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">120 + (45/2)</gadget>
<output>285/2 = around 142.5</output>

<result>285/2 = around 142.5</result>