[填空题]
The fictional starship Enterprise29fvcv9/xfr icy 9/:jky k/p/sf4tmv obtains ih 7a014gy r uagivu,n,m5f/jnc7l 5itts power by combining matter and antimatter, achieving complete conversion of mass into energy. If the mass ,u 1vafi5uhtnc7 7mg4jnlr5 y/ ,g0iaof the Enterprise is approximately $5 \times 10^9 \, \text{kg}$, how much mass must be converted into kinetic energy to accelerate it from rest to one-tenth the speed of light? $\times 10^7 \, \text{kg}$
