Pay attention to safety

The next morning.

In front of the lake 160 kilometers away from the entrance to the world of calamity and shadows, the gardener Pi, who was wearing a fisherman's hat, got off the go-kart. In the sky behind him, there was a huge humming whale swimming.

"I'm planning to build a house here. Can you play around with this Lake?"florist Pi pointed at the lake.

The gardener Pi turned around and looked up. The humming whale was about 37 or 38 meters long and weighed more than 200 tons. The lake was more than enough to hold it.

The lake was more than 40 kilometers long from east to west and more than 30 kilometers wide from north to south. It was very close to a rectangle and covered about 1200 square kilometers.

However, compared to the ocean, no matter how big the lake was, it was useless. Moreover, if he wanted the humming whale to have fun in it, the depth had to continue to expand.

"How about we double its original size?" florist Pi asked.

"Chi ....