<span>16440/60*40+8888=19848</span>
<span>1) 16440/60=274</span>
<span>2) 274*40=10960</span>
<span>3) 10960+8888=19848</span>
<span><span>15260/70*60-7777=5303</span></span>
<span><span>1) 15260/70=218</span></span>
<span><span>2) 218*60=13080</span></span>
<span><span>3) 13080-7777=5303</span></span>