calculate roughly

“We have just a few years - scientists calculate roughly fewer than 30 - to drastically reduce the emissions of gas and the greenhouse effect in the atmosphere,” the pope said, adding that the transition needs to take into account the impact on the poor, local populations and those who work in the energy sector.

“We have just a few years — scientists calculate roughly fewer than 30 — to drastically reduce the emissions of gas and the greenhouse effect in the atmosphere,” the pope said, adding that the transition needs to take into account the impact on the poor, local populations and those who work in the energy sector.

Should a leak be heard, the system can calculate roughly where it might be along a length of pipe, based on the speed at which sound travels through the pipe's material.

Well, let me calculate roughly—taking the population of London at four millions, and the average daily consumption for each individual at—no, I can't work it out with sufficient accuracy while I am dancing; suppose we sit down, and I'll do it for you on my shirt-cuff—oh, very well; then I'll work it out when I get home, and send you the result to-morrow, if you will allow me.

From here one could see the parson turning the leaves of his sermon, and so calculate roughly how far he was from the end.