This totally highlight the problem with Imperial Units:<p>&quot;ARES wants to lay a nearly 5.5 mile track up an 8 degree slope, gaining about 2,000 feet top to bottom. ARES would then put up to seven 8,600-ton trains on the track&quot;<p>If the units were in SI[1], 1000 * 5.5[km] * 8&#x2F;100 = 55 * 8 = 440m (no calculator&#x2F;conversion needed)<p>And for the energy stored, just do 440m * ~10m&#x2F;s2 (g) * 8,600,000kg<p>[1]no conversion, just an example