Surviving the Demon Realm: I Have a Hundredfold Reward

All of humanity transmigrates to the Demon Realm Continent, each starting with a tiny territory. Everyone is equal here, but to survive, people fight tooth and nail! And that is not even the cruelest trial… [A demon army is coming! Upgrade your territory as soon as possible!] Zhang Ze activates the Hundredfold Rewards System, which can grant a hundredfold reward for anything! He obtains a piece of sour rye bread… [Hundredfold reward available. Choose one:] [1. One hundred pieces of sour rye bread.] [2. One Michelin-starred cream cake.] He obtains an ordinary rusty iron sword… [Hundredfold reward available. Choose one:] [1. One hundred ordinary rusty iron swords.] [2. One top-grade plasma lightsaber.] He recruits a heavily armored knight… [Hundredfold reward available. Choose one:] [1. One hundred heavily armored knights.] [2. One nuclear-powered mech warrior.]…From then on, Zhang Ze rises to the top! While everyone else is still worrying about how to repel the next demon army, Zhang Ze is already leading his high-tech forces across the Demon Realm Continent, even storming the Demon King's lair!