13,

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13,13, 13,9h=32400sq=itq=0.4×32400q=12960c t=q÷it=12960÷0.3t=43200s12h

13,
13,

13,

9h=32400s
q=it
q=0.4×32400
q=12960c

t=q÷i
t=12960÷0.3
t=43200s
12h

13 13 13, 13, 13 13 13, 13, 13～ 13 13, 13, 13~ 13, 13, 13 13 , 13