 
<translate> Buru ụzọ chọpụta mmiri ole na-eju n'ime otu awa: 40 ml/nkeji * 60 nkeji/awa = 2400 ml/awa. Mgbe ahụ, wepụ mmiri nke na-agbaze iji chọpụta ngụkọta mmiri a gbakwunyere kwa awa: 2400 ml / hour - 200 ml / hour = 2200 ml / hour. Mgbe ahụ, mụbaa nke ahụ site n'ọnụ ọgụgụ awa iji chọpụta mmiri nile dị na tub: 2200 ml/hour * 9 hours = 19800 ml. Mgbe ahụ chọpụta ọnụọgụ nke milliliters dị na lita 12: lita 12 * 1000 ml / liter = 12000 ml. Mgbe ahụ wepụ mmiri Jack wepụrụ site na ngụkọta mmiri iji chọta mmiri fọdụrụ: 19800 ml - 12000 ml = 7800 ml. Ya mere, azịza ya bụ 7800. <eng> First find how much water fills the bathtub per hour: 40 ml / minute * 60 minutes / hour = 2400 ml / hour. Then subtract the water that evaporates to find the total amount of water added per hour: 2400 ml / hour - 200 ml / hour = 2200 ml / hour. Then multiply that amount by the number of hours to find the total amount of water in the tub: 2200 ml / hour * 9 hours = 19800 ml. Then find the number of milliliters in 12 liters: 12 liters * 1000 ml / liter = 12000 ml. Then subtract the water Jack removes from the total amount of water to find the remaining amount of water: 19800 ml - 12000 ml = 7800 ml.
Therefore, the answer is 7800. 