萬頃

万 = 丆 + ㇆ : As mnemonic symbol I choose a neuron, since each neuron is said to connect to 10000 others.

万 = 丆 + ㇆ : Willy Walrus needs to dig up the floor in the anthill's bathroom, but he is tired of doing so manually with a plough. To make his life easier, he sets up a wind wheel for electricity, connects a neuron to the wind wheel and the plough to transmit the electricity and uses his new DIY electric plough to dig much faster.

顷 = 匕 + 页 : The Queen of Hearts (qi) has to wallpaper one hectare (顷) of the engine's walls ((e)ng3). Although her only tool is a ladle (匕) she finishes the whole hectare in a moment (顷).